Primary consumer: Zooplankton

Zooplankton are plant eaters (herbivores) that eat phytoplankton. Some will ingest toxins from the phytoplankton.

Identification/common taxa key of the zooplankton in the image: 1: Calanidae, 2: Temora stylifera, 3: Calocalanus, 4: Clausocalanus, 5: Oncaeidae, 6: gastropod larva, 7: doliolid, 8: fish egg, 9: decapod larva.